/Engine/Source/Runtime/Experimental/Chaos/Public/GeometryCollection/GeometryCollectionClusteringUtility.h
Simplify the geometry collection by removing cluster nodes w/ a parent and only one child, re-parenting the child to its grand-parent. Returns true if any nodes were removed.
static bool RemoveClustersOfOnlyOneChild ( [FGeometryCollection](API\Runtime\Chaos\GeometryCollection\FGeometryCollection) * GeometryCollection )